Apparatus for coating cores



Jan. 25, 1927. 1,615,394

. J. s. LITTLE APPARATUS FOR COATING CORES Filed July 9. 1924 :s Sheets-Sheet 1 l zweizzor: l/z/m 5/31/ 159 1211302 Jan. 25 1927.

. 1,615,394 J. s. LITTLE APPARATUS FOR COATING CORES File ly 9' 1924 3 Sheets-Sheet 2 Li JLA J7LU6/Z20F" (fa/2J2 Shirley 131m Jan. 25, 1927. 1,615,394 I J. LITTLE APPARATUS FOR COATING CORES Filed July 9) 1924 3 Sagas-Sheet s Patented 7 Jan. 25, 1927.

' UNITEDOSTVATEAS PATENT OFFICE.

JOHNSHIRLEY LITTLE, OF LA GRANGE, ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

APPARATUS FOR COATING CORES.

Application filed July 9,

This invention relates to apparatus for coating cores, and more particularly to apparatus for coating cores with pulpous material.

The object of this invention is to provide an apparatus for coating a plurality of cores with pulpous material and so designed that a plurality of cores may be coated simultaheously.

The invention is especially adapted to be used in practicing the method of coating cores described in my copending application, Serial No. 716,842, filed May 30, 1924, which method preferably consists in applying a ribbon of moist pulpous material to a core, removing excess moisture from the ribbon of pulpous mate'rial, wrapping the ribbon around itself and around the core, andthen drying the pulpous. material bysubjecting it to circulating air ofpredetermined relative humidity and temperature. The pulpous material then becomes a uniform coating for the core. I

A feature of the invention is the provision in apparatus comprising means for applying moist pulpous material to a core, a plurality .of means spaced from each other for removing excets moisture .from the applied .pulpous material, and means for forming the pulpous material into a dry uniform coating for the core, of means forsupporting the core and the pulpous material applied thereto when the core travels from one of the plurality of means for removing excess moisture to the other. i

Other objects and features of the invention will become apparent as the detailed description progresses,- reference being had to the accompanying drawings wherein,

- Figs. 1 and 2 are complementary a plan elevation of apparatus emodyin'g the invention;

Figs. 3 and 4 are "complementary parts of a longitudinal verticalsectionthrough theapparatus shown in Figs. 1' and 2:

- Fig. 5 is' a plan view ofa portion of an apparatus shown in Flgs. 1 to 4, incluslve,

this portion of the apparatus being adapted to subject a plurality of cores to a'liquid containing pulp; v

Fig. 6 is a vertical section taken on line G 6 of Fig. 5;

arts of.

1924. Serial No. 725,045.

\Fig. 7 is a vertical section taken on line 7 7 of Fig. 6; I

- Fig. 8 is a vertical section taken on line 8-8 of Fig. 7 and Figs. 9 to 12, inclusive, are enlarged transverse sections which progressively illustrate the manner in which the apparatus shown in Figs. 1 to 8, inclusive, coats a core with pulpous material.

The apparatus illustrated in the drawings is adapted to .coat a plurality of cores in strand form simultaneously, the cores being,

subjected to a liquid containing pulp in such manner that pulp is deposited thereon. Excess moisture is then squeezed from the I drum I6 which is partly submerged 'in a liquid containing pulp held in a tank 17. As shown in Figs. 5 to 8, inclusive, the drum 1 16 comprises a; plurality of spiders 18 rigidly secured to a shaft '19 which is rotatably journaled in a plurality of bearings 20 mounted upon the wallsof the tank 17. A plurality of bars 22 secured to the spiders 18 for m a support for a helical member 23 which is formed of a rod wound around the barsi The helical member 23 supports a coarse mesh screen 24, which in turn supports a fine mesh screen 25, the.fine mesh screen 25 being covered. by a plurality of rings or dams 26 of some waterproof material suchas okonite. The bars 22, the helical member 23, the screens 24 and 25 and the dams 26 together form a cylindrical wall for the 'drum 16, the dams 26 being spaced from each other to provide a plurality of annular passages 27 through which liquid may flow from the tank 17 into the drum 16. Liquid enterin the drum may flow out through the ends thereof. Each end of the drum is provided with an' annular member 30 disposed concentrically with respect to '35 between the chambers 33 so that liquid insures a forced circulat on between the vat and the tank tl'llOllgll the foraminous pasmay flow from the left hand chamber 33 (Fig. 7 to the right hand chamber 33 and thence through a pipe 38 communicating with the right hand chamber 33,

It is obvious that if liquid containing pulp is introduced into the tank 17 the free liquid will flow through the annular passages 27 into the drum 16 and then into the chambers 33 from which it may be drawn by way of the pipe 38. To prevent the liquid from escaping through the joints formed by the annular members 30 and the annular flanges 31, a plurality of strips of felt 40 are provided, each strip 40 being held snugly against one of the annular flanges 31 and one of theannular members 30 to form a practically water-tight joint between these parts. The means for holding the strips of felt in place comprises a plurality of metallic bands 41 each of which has one of its ends secured to a pin 42 projecting from one of the side walls 32 and the other of its ends secured to a bracket 46 carried upon one end of a bolt 43. The bolt 43 is mounted in :1 lug 44 projecting from the side wall and is provided with a wing nut 45 which may be employed to draw the metallic band 41 against the felt strip 40.

The tank 17 is preferably supplied with moist pulpous material from a mixing vat (not shown) by means (not shown) which 27. In practice, pulpous material suitable for the manufacture of paperis em ployed. The liquid containing pulp is supplied to the tank through a pipe 48 which is adapted to discharge into the space between two walls 49 and 50 with which the tank 17 is provided at. one end thereof (Fig. 6). Disposed intermediate the walls 49 and 50 are a plurality of battle plates 51 which insure that the liquid containing pulp will become thoroughly mixed before it enters the tank by flowing over the wall 50 which is of less height than the wall 49. A pair of gates 52 disposed above the wall 50 insure that the liquid containing pulp will flow over the entire length of the wall 50. The gates 52 are pivotally mounted upon a bracket 53 by a bolt 54 which is provided with a wing nut 55 whereby the gates may be secured in a plurality of adjusted positlOIlS with respect to the wall 50. The

a frame 77.

means (not shown) for maintaining a circulation between the mixing vat (not shown) and the tank 17 may be adjusted to keep the pulp mixture at a predetermined level in the tank and to keep the liquid in the drum 16 below the level of the pulp mixture in the tank. Should the level of the liquid within the drum 16 tend to rise above the predetermined point, the excess liquid will flow over a plurality of vertically disposed gates 58,

provided in the chambers 33. The gates 58 are slidably mounted in the chambers 33 and may be secured in adjusted positions by means of wing nuts 60 threaded upon bolts 61 projecting from the gates and through slots 62 formed in the side walls 32 of the tank. Liquid flowing over the gates 58 is discharged from the apparatus through a plurality of drain pipes 64.

As shown in Figs. 2 and 4, the cores which are subjected to the liquid containing pulp are withdrawn from a plurality of supply reels 65 mounted upon a shaft 66 which is mounted in a plurality of brackets 67. The cores, which are indicated by the reference character 69, are trained over a plurality of sheaves 70 carried by a shaft 71 which is mounted in the side walls 32 of the tank 17. The cores 69 are also trained around the annular foraminous passages 27, each core 69 being centrally disposed in one of the passages. The drum is rotated by the cores as they are drawn through the apparatus, a ribbon of moist pulpous material being formed for each core as it passes around the drum. The construction is such that some of the pulp is first strained onto the fine mesh 25 before the cores are brought into contact therewith. Then when the cores contact the initial layers of pulp on the screen and the drum continues to revolve in the tank, an additional amount of pulp will be deposited on each core and the screen.

The pulpous material deposited upon the cores and the screen will adhere to the cores in the form of ribbons 73 as illustrated in Fig. 9. A woven belt 75 aids in freeing the pulp ribbons from the screen 25 when thecores leave the drum 16, the belt 75 being held into'contact with the drum by a felt covered roller 76 rotatably mounted in The felt covered roller 76 co-- acts with the belt 75 and the drum 16 to squeeze the excess liquid from the pulpous material adhering to the core,.the core and its ribbon of pulpous material being advanced with the belt 75 and between it a similar belt 79.

The belt 75 is trained over a plurality of rubber covered rollers 80 and 81 and over a plurality of rolls 8 3, the rollers 80 and 81 ,1 and the rolls 83 being rotatably journaled belt 79, the belt 79 being held in contact ciently porous to allow the liquid to escape therethrou'gh. This construction is particu' larly advantageous in that the belt 75 and 79 prevents the cores from whipping as they travel from the squeezing rollers 81 and 86 to the squeezing rollers 80 and 85, it being obvious that Whipping of the cores would be accompanied by displacement of the ribbons of pulpous material relative to the cores, The belt 75 supports the cores and the pulpous ribbons or force the cores and the ribbons of pulp as they are advanced from one pair of squeezing rollers to the other in such manner that the pulp ribbons will not dangle from the cores and lose the form which is imparted to them by the felt roller'76 and the drum 16. Fig. illustrates the form which is imparted to each ribbon of the pulpous material by the felt covered roller 76 and the drum 16. The belts and 79 also facilitate the task of coating a plurality of cores simultaneously as the belts hold the cores to parallel paths as they are advanced from the squeezing rollers 81 and 86 to the squeezing rollers and 85. This prevents a the ribbons of pulp from becoming entangled with each other. The ribbons of pulpous material are sufiieiently dry, when they leave the wet end 15, that the cores alone will support them.

A plurality of forming mechanisms 90 are adapted to receive the cores 69 with the ribbons of pulpous material when they are discharged from the wet end 15. The forming mechanisms 90 may be of the type shown and described in the copending application of H. W. .lespersen, Serial No. 713,704, filed May 16, 1924:. and are rotatably mounted in a hollow frame 91, means indicated at 92 being provided for rotating the forming mechanisms. The forming mechanisms 90 are adapted to wrap each pulpous ribbon around itself and around pulpous material, means for applying pulpthe core associated therewith to form a uniform coatingfor the core. The manner in which a pulpous ribbon is wrapped around itself and around a core is illustrated in Fig. 11, the fully formedcoating being shown in Fig. 12. It will be noted that a plurality of sheaves95 are provided for guiding the cores 69 as they are-advanced to the forming mechanisms 90 and that a plurality of sheaves 96 guide'them when they leave the forming mechanisms 90.

The coated cores aredried in a.hous1ng 100 adapted-to receive them when they pass from the sheaves 96, a plurality of sheaves 101 being provided to guide them through a plurality of apertures 102 formed in one of the walls of the housing. 'The coated cores are trained over a plurality of sheaves 103 in the housing 100 and are discharged from the housing through a plurality of apertures 105 formed in another wall of the housing. -Means indicated at 106 isprovided for subjecting the pulpous coatings on the rcores to air of predetermined relative humidity and predetermined temperature. This means is described in detail in my aforementioned copending application and for that reason no particular description thereon need be given in this disclosure. When the coated cores pass from the housing 100 they are guided by a plurality of sheaves 108 to a plurality of take-up spools 109 which are driven by any suitable means (not shown).

What is claimed is: v 1. In apparatus for coating a core with pulpous material, means for applying pulpous material to a core, means for advancing" the core and the applied pulpous material, means for holding the pulpous material in contact with the core, and means for advancing the last-mentioned means.

2. In apparatus for coating a core with pulpous material, means for applying pulp-, ous material to a core, means for advancing the core and the applied pulpous material, and means 'travehng with the core for supporting the core and the applied pulpous material.

3. In apparatus for coating a core with pulpous material, means for applying moist pulpous material to a core, means for advancing the core and the" applied pulpousmaterial, and a porous belt traveling with the core for supporting the core and the applied pulpous material.

4. In apparatus for coating a core with pulpous material, meansitor applying pulpous material to a core, means for advancing the core and the pulpous material applied thereto, and a plurality of beltsco operating with each other to prevent relative displacement between the core and the pulpous material applied thereto.

5. In apparatus tor coating a core with ous material to a core, means for advancllO ing the core and the pulpous material applied thereto, and a plurality of; belts traveling with the core, for preventing relative displacement between the core and the pulpous materialapplied thereto.

6. In apparatus for coating a core with pulpous material. means for applying moist pulpousmaterial to a core, a plurality of means for removing moisture from the pulpous material, means for advancing the core and the applied pulpous material from one of said plurality of means to .the other, and porous means for supporting the core and the pulpous material as they are advanced.

7. In apparatus for coating a core with pulpous material, means tor applying moist pulpous material to a core, a plurality of means for removing moisture from the pulpous material, means for advancing the core and the applied pulpous material from one of said plurality of means to the other, and porous means traveling with the core for supporting the core and the pulpous material as they are advanced.

8. In apparatus for coating a core with pulpous material, means for applying moist pulpous material to a core, a plurality of means for removing moisture from the pulpous material, means for advancing the core and the applied pulpous material from one of said plurality of means to the other, and a porous belt traveling with the core for supporting the core and the pulpous material as they are advanced.

9. In apparatus for coating a core with pulpous material. means for applying moist pulpous material to a core, a plurality of means for removing moisture from the pulpous material applied to the cdre, means for advancing the core and the pulpous material applied thereto from one of said plurality of means to the other, and a plurality of porous belts cooperating, with each other to support the core and the pulpous material applied thereto as they are advanced.

10. In apparatus for coating a core in strand form with pulpous material, means for applying a ribbon of pulpous material to a core, means for advancing the core and the ribbon, means traveling with the core and the ribbon for preventing displacement of the ribbon relative to the core, and means for wrapping the ribbon around the core.

11. In apparatus for coating a core in strand form with pulpous material, means for applying a ribbon of moist pulpous material to a core, means for advancing the core and the ribbon, means..traveling with the core and the ribbon for preventing displacement ofithe ribbon relative to the core, a plurality of means spaced from each other and cooperating with the last-mentioned means for squeezing liquid from the ribbon, and means for wrapping the ribbon around the core.

12. In apparatus for coating a core with pulpous material, means for applying moist pulpous material to a core, means for advancing the core and the pulpous material applied thereto, means traveling with th core and the pulpous material applied thereto for preventing displacement of the pulpous materlal relative to the core, and means for sub ecting the pulpous material to air held at a predetermined temperature.

13. In apparatus for coating cores with pulpous material, means for simultaneously applying pulpous material to a plurality of cores, means for advancing the cores with the pulpous material thereon, and common and common means traveling with the cores and the pulpous material thereon for preventing displacement of the pulpous material relative to the cores.

15. In apparatus forcoating cores in strand form with pulpous material, means for simultaneously applying ribbons of pulpous material to the cores means for advancing the cores and the ribbons thereon, and means traveling with the cores and the ribbons thereon for preventing displacement of the ribbons relative to the cores.

16. In apparatus for coating a core in strand form with pulpous material, means for simultaneously applying ribbons of pulpous material to a plurality of cores, means for advancing the cores with the ribbons thereon, and a traveling belt for supporting the cores and the ribbons.

17. In apparatus for coating a core in strand form with pulpous material, means for contemporaneously applying ribbons of pulpous material to a plurality of cores, means for advancing the cores with the ribbons thereon, and a plurality of traveling belts cooperating with each other to pre-- vent-displacement of the ribbons relativeto the cores. Q

18. In apparatus for coating a core, means for applying unfinished paper to the core, means for advancing the core and the unfinished paper thereon, means traveling with the core and the unfinished paper for pre venting displacement of the unfinished paper relative to the -.core, and means for completing the fabrication of the paper on the core.

19. In apparatus for coating a core, means for applying unfinished paper to the core, means for advancing the core and the unfinished paper thereon, a plurality of belts traveling with the core and the unfinished paper for preventing displacement of the unfinished paper relative tovthe core, and means for completing the fabrication of the paper on the core.

- 20. In apparatus for coating cores with pulpous material, means'f'or applying pulpous material to a plurality of cores, and means traveling with the cores 'for holding them in parallel paths.

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21. In apparatus for coating cores in simultaneously, a plurality of means for re- 1 strand form with pulpous material, means moving excess moisture from the pulpous for advancing a plurality of cores, means material applied to the cores, means for for applying ribbons of pulpous material to advancing the cores and the applied pulp- 5 the cores, means for holding the cores in ous material fromone of said plurality of parallel paths, and means for Wrapping the means to the other, and means for holding 15 ribbons around the core. the cores to parallel paths.

22. In apparatus for coating cores with In witness whereof, I hereunto subscribe pulpous material, means for applying moist my name this 28th day of June A. D, 1924:. pulpous material to a plurality of cores JOHN SHIRLEY LITTLE. 

